Answer is number 1
Oxygen O2
Ozone O3
An ideal gas is one in which the gas molecules do not
interact with each other, hence intermolecular forces of attraction is
negligible. For this to occur, the pressure must be low and temperature is high
so that the volume or space between molecules is very large. This can be taken
from the ideal gas equation:
PV = nRT
where an increase in temperature and decrease in pressure
makes the volume increase
<span>So a noble gas other than radon which would depart most
readily from ideal gas behaviour must have also a high density. From the
tables, this would be Xenon.</span>
Answer:
The Microscope
Explanation:
Before the 1600s, every living thing was a part of a two kingdom classification system derivative of binomial nomenclature. This was proposed by Linnaeus, a Swedish Naturalist, who split all living things into either the animalia or plantae kingdom. After the invention of the microscope however, a new detailed classification system was put in order to accommodate for microscopic life. This new system recognizes the existence of 6 kingdoms: eubacteria, archaebacteria, prostista, fungi, plantae, and animalia.
Explanation:
Organisms form species if they live together and can reproduce offspring. A group of organisms of the same species living in the same place at the same time is called a population. If we put populations of different species together, that's called a community. So, a community needs groups of different species to exist.